Map Lovers’ Monday: Schuylkill River from Wissahickon Creek to Norristown, 1913
Sandy Run Watershed and the Holmesburg Water Works
Fairmount Park topographical map, showing East Park Reservoir, 1872
Thomas Mill Covered Bridge over Wissahickon Creek (Picturesque America)
Plans and maps of the Pennypack Creek Watershed in Philadelphia
Wingohocking Sewer across Penn St.
Early photographs of Fairmount and vicinity, 1848
Frankford Creek Watershed: A historical overview of the Philadelphia section
Report on channelization of Frankford Creek for flood control (1947)
Frankford Creek Watershed Historical Timeline
